GenVibe - Community for Pontiac Vibe Enthusiasts

Engine light keeps coming on. Had it checked 2 days ago and got Code PO128: Coolant temp below regulating temp.Light reset, no problems found... light came back on two days later.Gas cap is tight...any ideas.Thanks,MLC

Welcome aboard. We had someone else around who had something similar, I'll see if I can dig up the thread for you.Sounds like it is running too cold... I would start with checking into the thermostat, could be stuck open, not allowing the engine to warm up to where it needs to. Wouldn't be a bad idea to get a coolant flush while you're at it. What year, engine, and mileage do you have?

Yep, here you go - same code and everything. Maybe that will help.